Nf-644 is a hiking, biking, and horse trail in Coconino County, Arizona. It is within Kaibab National Forest. It is 4.3 miles long and begins at 6,428 feet altitude. Traveling the entire trail is 8.7 miles with a total elevation gain of 603 feet. The Table Rock Tank (elevation 6,073 feet) reservoir can be seen along the trail.
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